#include<stdio.h>   
#define Nmax 21

int n,m,p[Nmax],i,j;
  
void back_comb(int k)
{   
if(k==m+1)
 {for(j=1;j<=m;j++)
       printf("%d ",p[j]);
    printf("\n"); }
 else for(i=p[k-1]+1;i<=n;i++)
     {p[k]=i;
      back_comb(k+1);}
}   
int main()   
{   
freopen("combinari.in","r",stdin);
freopen("combinari.out","w",stdout);
scanf("%d %d",&n,&m);
back_comb(1);
return 0;
}